Receiver for printing-telegraph systems.



C. 6. ASHLEY & E. T. BYSHE. RECEIVER FOR PRINTING TELEGRAPH SYSTEMS.

APPLICATION FILED 1ULY10,'1913.

Patnted May 9,1916.

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Specification of Letters Patent.

RECEIVER FOR PRINTING-TELEGRAPH SYSTEMS.

Application filed July 10, 1913. Serial No. 778,256.

To all whom it may concern:

Be it known that we, CHARLES G. ASH- LEY,,5L citizen of the United States of America, and aresident of Chicago, county of Cook, and State of Illinois, and ERNEST T;

BYSHE, a citizen of the Dominion of Canada, and resident of Toronto, county of York, and Province of Ontario, vented a new and useful Improvement in Receivers for Printing-Telegraph Systems, of which the following is a specification.

Our invention relates to automatic printing telegraph systems of the class using printing characters which, from the nature of their making, may be termed composite characters and embodies a novel and improved receiver for use with such systems which utilize a novel and improved method of recording impressions on a recording sur face.

It is with a view toward simplifying the mechanism and manufacture and obtaining infallibility and maximum efficiency of operation that our invention is directed. These and other desiderata which will subsequently be disclosed herein, we accomplish by employing a magnetic field which normally maintains a series ofarmatures bearing hammers in a position which restrains the hammers from contact with a receiving surface which liesbetween the hammers and a solid type block presenting adjacent to the under portionof the receiving surface, a type face composed of elemental character components and further means to cause the hammer borne by any selected armatureto strike said receiving surface to imprint thereon from said single type a selected portion of its type face.

in the figures which accompany and form a part of this specification and in which like numerals designate corresponding parts throughout, Figure 1 illustrates in diagram a simple form of transmitter, ourimproved receiver and the conductors connecting them. Fig. 2 is a plan view of the printing type of our improved receiver. Fig. 3 is an elevationof the same. Fig. 4; is a side elevation of our receiver. Fig. 5 is a sectional view of the same taken on the line A-A of Fig. 41, Fig. 6 is a section of transmitting tape perforated to send a few selected characters and record the same with our improved re- Canada, have into impress'selectively upon the coils of the ceiver. Fig. 7 is a section of receiving tape showing the outline of the selected characters as recorded by our improved receiver.

ile we have presented at the left of Fig. l in diagram a simple form of trans mitter,.our improved receiver is adaptable to use with any type of transmitting mechanism provided this mechanism is designed receiver, current impulses of variant polarity. The transmitter shown comprises two direct current dynamos 20 and 21. or other convenient sources of current, their terminals of opposite polarity being connected together and to ground 22 while the negative terminal of dynamo 21 is connected to brushes 18 and 18 and the positive terminal of dynamo 20 is connected to brushes 18 and 18 A brush 15 is connected to line conductor 40 and is of suflicient width to bear. upon both brushes 18 and 18 and make contact therewith while a brush 16 is connected to line conductor 41 and is of suflicient width to bear upon brushes 18 and 18 and make contact therewith. Brushes 15 and 16 are, however, normally held out of contact with their respective pair of brushes 18 18 and 18 18 by means of a transmitting tape 17 through perforations in which contact may be selectively made between any brush of a pair of brushes as 18 and 18 with their respective line brushes as 15 and 16 to send selectively over either line conductor 40 or ll and I tive impulses as required. The transmitting mechanism thus constitutes a simple means for selectively transmitting to the receiver coils, current impulses of variant polarity.

Our improved receiver,.the line connections of which are indicated in diagram at the right ofFig. l and the mechanism in more detail in Figs. 2 to 5 inclusive, com- Patented May a, rare.

ground, negative or posiprises a permanent magnet 35 ofthe form shown in Fig. 1. A series of bell-crankshaped armatures 10, 10 10 and 10"? which may be formed of either iron or steel are pivoted by means of a pin 37 in a series of slots cut in a brass-supporting member 37 which is attached by screws as indicated to one pole face of the permanent magnet 35. The other pole face of the permanent magnet is beveled to an edge which lies in the plane of the axis of rotation of the armatures 10 1O while each of the extremities of the arms of the armatures that extend substantially across the air gap of the permanent magnet are beveled to an edge which likewise lies in the same plane as the axis of rotation of the armatures. A small hammer is borne as an integral part thereof upon each extremity of the extended portions of the armatures 10-10 and the extended portions or arms of the armatures are bent to bring their respective hammers into such relation to each other as that shown in Fig. 5. The printing type 30 shown in Figs. 2 and 3 is placed adjacent to all of the hammers and isadjustable in its distance therefrom by means of a screw 30 This printing type is preferably made from one solid piece of metal and presents to the under surface of a recording tape a series of type faces 1, 2, 3, and 4 grouped to form a printing symbol as shown in Fig. 2.

, The type faces are cut in relief in the block 30 and are disposed in a definite relation to each other as will be hereinafter fully described.

A. pair of guides 30 and 30 are rigidly attached to the upper surface of the type block 30 as indicated and serve to guide. an inked ribbon 140 in its longitudinal travel over the type faces 1. 2, 3 and 4 and to normally maintain it from contact with the type faces. An additional pair of guides 30 and 30* are formed as an integral part thereof of the guides 30 and 30 respectively and serve to guide the recording tape 141 and normally maintain it out of contact with the inked ribbon140. The type block 3O bearing the type faces 1. 2, 3 and 4: and

the guides 30 30 30 and 30 may be adjusted in its distance from the hammer armatures 1O -10* by means of a screw 30 as hitherto mentioned.

A series of electromagnets 31, 32, 33 and 34 are rigidly held in a brass apron 36 which is in turn attached to the upper pole face of the permanent magnet 35 by means of screws as 36 The electromagnets 31-34 are so placed in the apron 36 and the apron is soplaced on the permanent magnet 35 that the poles of the electromagnets 3134are maintained opposite and slightly removed from their respective hammer armatures 10 -40 Thus they are so positioned as to produce adjacent to their associated hammer armatures when energized a magnetic field which is substantially at right angles to the polarizing field produced by the magnet 35.

The beveled pole face of the magnet '35 and the pointed extremities of. the armatures 1O 10 serve to concentrate all. the magnetic flux into substantially a line which 1 lies'in the axis of rotation of armatures and as the apex of the printed extremities of the armatures lies in the axis of their rotation,

they are normally maintained in a definite position which restrains the hammers which they bear from contact with the recording surface.

Referring now especially to Fig. 1 it will be observed that the windings of electromagnets 31 and 32 are connected in series and to line conductor 40 and ground 23 and that electromagnets 33 and 31 are likewise connected in series and to line conductor 1-1 and ground 23. Electromagnets 31 and 32 are so wound that when energized by the passage of electric current through their helices unlike magnetic poles are manifested on their core extremities. Similarly electromagnets 33 and 34: are so wound as to present unlike magnetic poles upon their core extremities when energized, by the passage of current through their helices; thus we will assume that a positive impulse of current over line conductor 40, electromagnets 31 and 32, to ground produces upon the pole face 31 (Fig. 5) of electromagnet 31. a, N. magnetic pole and an S. pole on the pole face 31 However, as the upper extremity of the hammer armatures 10 10* are polarized to present S. magnetic poles as indicated by the lettering on the permanent magnet 35. it is evident that there has been created adjacent to the S. pole of armature 10 a N. magnetic pole which is substantially at right angles to the polarizing field and hence the armature attempts to' place itself in the field resultant from the two component fields and thereby causes the hammer which the armature bears to exert pressure on the receiving tape 141 and inked ribbon 140, over a particular portion of the type face of the type block 30, as indicated by the dotted outline and dotted index designated by the numeral 10 in Fig. 2, thus causing an impression of type face 1 to be recorded on the under surface of the receiving tape 141. This same current impulse over line 40 through electromagnets 31 and 32 which produces a N. magnetic pole upon the pole face 31 of electromagnet 31 also produces an S. magnetic pole upon the pole face 32 which as the armature adjacent thereto. 10 is polarized to have an S. magnetic pole upon its upper extremity. the armature tends to rotate to assume a position in the field resultant from the polarizing field and the newly created repelling field and the hammer which the armature bears is thus lifted farther from the receiving tape and an impression of type 2 is not recorded. A negative impulse of current over line conductor 40 through the helices of electromagnets 31 and 32 produces a N. magnetic pole on pole face 32 of electromagnet 32 which results in imprinting an impression of type face 2 as hitherto explained. Further a positive impulse of current over line conductor 41 through electromagnets 33 and 34: produces a N. magnetic lOJ pole on pole face 34 to record an impression of type face 4 while a negative impulse of current over the same line conductor and through the same electromagnets produces a N. magnetic pole on pole face 33 torecord an impression of type face 3; thus by means of impulses transmitted over the line conductor 40 and 41 through electromagnets 31, 32, 33 and 34 in predetermined pairs any type face of the group presented by the type block 30' may be selectively recorded on the receiving tape dependent upon which line conductor the impulses traverse and upon the polarity of the impulses. v

A transmitting tape 1'7, a portion of which is shown in Fig. 6 is used to select the proper line conductor and polarity of impulse to correctly build up the im ressions from the elemental type faces to form legible roman characters. On the tape the perforations are spaced longitudinally along four transversely spaced rows 19 19 19 and 19* corresponding to the lines of contact of the brushes 18 18 1.8 and 18 respectively with the brushes 15 and 16. Thus a perforation in the tape on line 19 allows contact to be made between brush 18 and brush 15 to transmit from the negative terminal grounded dynamo 21, a negative impulse of current over line conductor 40, through electromagnets 31 and 32 to ground, to imprint as hitherto described an impression of type face 2; similarly perforations in the tape spaced longitudinally on the lines 19 1 9 and 19 allow current impulses of the proper potential to traverse the proper line conductor to imprint type faces 2, 3 and 4 respectively.

It remains now to disclose the method of building up the impressions from the type faces to form legible characters.

Referring to Fig. 2 which illustrates the type faces as they are grouped in the single type block 30, it will be observed that the faces 1, 2, and 3 are each in width equal to the width of a complete normal character, such as H and that this width is divided into four equal units; each of the type faces being separated from its adjacent type face by one of these units of width to form the printing symbol. The longitudinal spacing of the perforations on the transmitting tape 17 is dependent upon the ratio between the speed of the transmitting and receiving tapes and is such that while the receiving tape moves one unit of width of a complete normal character as imprinted by the printing symbol, the transmitting tape moves a dis tance equal to the distance between anytwo transverse lines thereon.

The character A is transmitted and recorded as follows: Conceive the transmitting tape 17 perforated as shown in Fig. 6 to move from right to left as viewed in the figure between the brushes 18 -48 and 15 and 16 of the transmitter of Fig. 1 at a speed whichallows one transverse spacing of the tape or one tape interval to pass the contact line of the brushes while the receiving tape 141 is being drawn from right to left over the type faces of Fig. 2 or as shown by the direction of thearrow in Fig. 5, a dis tance equal to one unit of width of a comwidth of a normal character, a perforation in the transmitting tape spaced on the line 19* again allows contact to be made between brushes 18 and 16 to send a positive impulse of current over line conductor 41 through electromagnets 33 and 34 to ground to again imprint type face 4 upon the receiving tape a distance away from the previous impression which is equal to the width of a complete normal character. lVhen the transmit ting tape has moved two additonal. tape intervals a perforation in the tape on the line 19 allows contact to be made between brushes 18 and brush 15 to send a positive impulse of current from dynamo 20 over line conductor 40 through electromagnets 31 and 32 which imprints an impression of type face 2, and as the receiving tape 141 has since the last impression of type face 4. moved a dis tance equal to two units of width of a normal character. the impression of the type face 2 falls with its two extremities in contact with the middle portions of the two previous impressions of type face 4. After the transmitting tape has moved an additional tape interval during which time the receiving tape has also moved one unit of width of a normal character, a perforation in the transmitting tape placed on the line 19 allows a negative impulse of current to be sent over line conductor 40 through electromagnets 31 and 32 to record an impresthis impression falls.

sion of type face 1; with its free horizontal extremity in contact with the upper extremity of the last made impression of type face 4 while the vertical leg of the imprint of type face 1 registers with the upper half of the first impression of type face 4 to form the character A. Similarly all of the characters of the alphabet and the numeralsfrom 0 to 9 may be built up and recorded as shown by the few selected characters of Fig. 7.

It will be observed from the foregoing that the type faces are out in relief in a solid type block, that they may be accurately positioned with respect to each other and that this position may be at all times maintained; further that the hammers are in effect small platens individual to their particular type faces and that thus an evenly distributed and uniform pressure is obtained between any type face and its associated platen to accomplish an even distribution of the ink in the impression derived from the type face. i

While we have disclosed but one embodiment of our device it should be clearly understood that we may make numerous changes in the details thereof, without departing-from the spirit or narrowing the scopeof our invention. 1

Having thus described our invention what we claim as new and desire to secure by United States Letters Patent, is as follows:

In a printing telegraph receiver. a receiving surface a type block maintained rigidly out of contact with said receiving surface, said typeblock presenting in relief type faces comprising elemental character components which constitute an illegible monogram, and means for bringing portions of said receiving surface selectively against said type faces to affect the impression of said type faces.

Signed by us at Toronto, county of York and Province of Ontario, in the presence of two witnesses.

CHARLES G. ASHLEY. ERNEST T. BYSHE. Witnesses H. M. Rown, A. SINCLAIR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

